86.4% is the change from 456 to 850
Calculation steps:
[( 850 - 456 ) ÷ 456] x 100 = 86.4%
Formula
Percentage change = [(850 - 456) / 456] x 100
Subtract the new number by the original number
850 - 456 = 394
394 ÷ 456 = 0.8640350877192983
0.8640350877192983 x 100 = 86.4%